Always show InternalWarning in testse

I found if you hit `InternalWarning` inside GPU-AV, it will not print anything out by default in a test due to the test callback system.

Should have a better way for tests to be warned

Start by tracing the test callback system and the InternalWarning path in GPU-AV. Determine why warnings are suppressed by default during tests; done means an InternalWarning is visible when triggered in a test.

Written by the indexing model from the issue text.